Agustin sits next to 4 phonetic neighbors — Augustine, Augustin, and Austin are the closest matches by sound. Most share Agustin's Spanish-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"to increase, augur"
"younger, the son"
"God is gracious"
"flower (from Greek anthos)"
"supreme, of highest rank"
"twin"
"God enlightens, he shines"
"spiritually reborn through baptism"
"elf counsel, wise counselor"
"counsel and protection"
"garden, vineyard"
"my God is help"
"hater of injustice"
"of the Frankish people"
"king"
"free man"
"brave in power"
"fiery, ardent"
Similar sound: These names share phonetic patterns with Agustin — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Latin origins, giving them the same cultural heritage as Agustin.
Rhythm: Agustin is a 3-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.